MongoEngine is an Object-Document Mapper (think ORM, but for Document Databases) for working with MongoDB from Python. The documentation is available at mongoengine.org/docs and the source is available on GitHub.

FireSheep, but for Google Chrome. It has two components—a server, written in CoffeeScript and Node.js, which sniffs sessions over a given network interface, and a Chrome extension that activates the sniffed sessions in the browser. Find the source on GitHub.